Is there any harm in mixing bio diesel and reg diesel during the course of a trip? Fuel stops I've looked at, a couple say they sell bio diesel whereas at home we have reg diesel.
On a recent trip we couldn't find anything but the bio-diesel mix in some parts of Iowa and Minnesota. I looked in my owners manual and I think it said the engine could handle up to a 20% mixture. I may have to look again, but, anyway it didn't seem to affect the engine performance. As we went west we got back into regular diesel.